drm/cirrus: fix leaky driver load error handling

Before this patch, cirrus_device_init could have failed while
cirrus_mm_init succeeded and the driver would have reported overall
success on load. This patch causes cirrus_device_init to return on
the first error encountered.
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/cirrus/cirrus_main.c

@@ -179,16 +179,21 @@ int cirrus_driver_load(struct drm_device *dev, unsigned long flags)
 	}
 
 	r = cirrus_mm_init(cdev);
-	if (r)
+	if (r) {
 		dev_err(&dev->pdev->dev, "fatal err on mm init\n");
+		goto out;
+	}
 
 	r = cirrus_modeset_init(cdev);
-	if (r)
+	if (r) {
 		dev_err(&dev->pdev->dev, "Fatal error during modeset init: %d\n", r);
+		goto out;
+	}
 
 	dev->mode_config.funcs = (void *)&cirrus_mode_funcs;
+
+	return 0;
 out:
-	if (r)
 	cirrus_driver_unload(dev);
 	return r;
 }